  <tr id="<%= "row_"+sheet.id.to_s %>">
  <td class="sheet_header"><%= check_box_tag(sheet.id.to_s, 0) %></td>
  <td class="sheet_header"><%= @sheets.index(sheet) + 1 %></td>
  <td class="cell"><%= link_to sheet.name, :controller => 'sheet', :action => 'show', :id => sheet %></td>
  <td class="cell"><%= sheet.created_at.to_formatted_s(:short) %></td>
  <td class="cell"><%= sheet.last_update.to_formatted_s(:short) %></td>
  </tr>
